A staggering 50,000 extra supermarket trolleys are set to be introduced into stores this month to cope with the Christmas rush.

End to end, the trolleys would stretch from one side of London to the other.

Reviva, which is part of Wanzl UK Group, said many of the trolleys sent into action would be refurbished ones from its ‘trolley graveyard’ in Derbyshire.

Demand for its services had soared in recent years, it added, with the number of trolleys sent to the site up 650%, from 8,000 in 2008 to more than 60,000 in 2011.

The company claimed it had saved more than 12,000 tonnes of CO2 for retailers by remanufacturing more than 150,000 trolleys since 2005.